nuttx-apps/system/taskset/taskset.c
2018-08-24 06:19:35 -06:00

189 lines
5.4 KiB
C

/****************************************************************************
* apps/system/taskset/taskset.c
*
* Copyright 2018 Sony Video & Sound Products Inc.
* Author: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <sched.h>
#include <errno.h>
#include "nshlib/nshlib.h"
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: show_usage
****************************************************************************/
static void show_usage(FAR const char *progname, int exitcode) noreturn_function;
static void show_usage(FAR const char *progname, int exitcode)
{
printf("%s mask command ... \n", progname);
printf("%s -p [mask] pid \n", progname);
exit(exitcode);
}
/****************************************************************************
* Name: show_usage
****************************************************************************/
static bool get_cpuset(const char *arg, cpu_set_t *cpu_set)
{
DEBUGASSERT(NULL != arg);
bool ret = false;
int val = atoi(arg);
if (0 < val && val < (1 << CONFIG_SMP_NCPUS))
{
*cpu_set = (cpu_set_t)val;
ret = true;
}
else
{
fprintf(stderr, "invalid cpuset %s \n", arg);
}
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
#ifdef CONFIG_BUILD_LOADABLE
int main(int argc, FAR char *argv[])
#else
int taskset_main(int argc, char **argv)
#endif
{
FAR char *nshargv[2];
int exitcode;
int option;
int pid = -1;
cpu_set_t cpuset;
int rc;
CPU_ZERO(&cpuset);
/* Parse command line options */
exitcode = EXIT_FAILURE;
while ((option = getopt(argc, argv, ":p:h")) != ERROR)
{
switch (option)
{
case 'p':
{
pid = (int)atoi(argv[argc -1]);
}
break;
case 'h':
exitcode = EXIT_SUCCESS;
goto errout_with_usage;
}
}
if (-1 != pid)
{
if (4 == argc)
{
if (!get_cpuset(argv[2], &cpuset))
{
goto errout;
}
rc = sched_setaffinity(pid, sizeof(cpu_set_t), &cpuset);
if (-1 == rc)
{
fprintf(stderr, "Err in sched_setaffinity() errno=%d \n", errno);
goto errout;
}
}
rc = sched_getaffinity(pid, sizeof(cpu_set_t), &cpuset);
if (-1 == rc)
{
fprintf(stderr, "Err in sched_getaffinity() errno=%d \n", errno);
goto errout;
}
printf("pid %d's current affinity mask: %x \n", pid, cpuset);
}
else
{
if (3 <= argc)
{
if (!get_cpuset(argv[1], &cpuset))
{
goto errout;
}
nshargv[0] = argv[2];
nshargv[1] = NULL;
sched_setaffinity(getpid(), sizeof(cpu_set_t), &cpuset);
usleep(10 * 1000);
pid = task_create("system", CONFIG_SYSTEM_TASKSET_PRIORITY,
CONFIG_SYSTEM_TASKSET_STACKSIZE, nsh_system,
(FAR char * const *)nshargv);
(void)waitpid(pid, &rc, 0);
}
}
errout:
return EXIT_SUCCESS;
errout_with_usage:
show_usage(argv[0], exitcode);
return exitcode; /* Not reachable */
}